Why did he have to shoot McCluskey and Sollozzo? When they found out they were eating at Louie’s they could have easily sent a hitman to be eating at another table and when Michael got up to go to the bathroom he gets up and shoots them. Michael comes out of the bathroom, everyone is freaking out having seen the hitman, and Michael just leaves and avoids having to go to Italy for a year. Plus avoid a possible problem with planting the gun if the gun happened to not fit behind the toilet. I always had a problem with that scenario.